RE: [PHP] Check for open file

> -----Original Message----- > From: Ashley Sheridan [mailto:ash@ashleysheridan.co.uk] > Sent: Thursday, March 03, 2011 2:03 PM > To: sstaples@mnsi.net > Cc: php-general@lists.php.net > Subject: RE: [PHP] Check for open file > > > As far as I was aware, if you're in the middle of writing to a file > and another script was attempting to write to it, the OS would prevent > that as you had an open lock on it. > > -- > Thanks, > Ash > http://www.ashleysheridan.co.uk > And as it turned out, that was not the case. I started copying a 200MiB file from my desktop machine onto the Samba share. While that was copying, I got onto the server and tried to copy the file to /tmp and it happily did that for me without any indication that it was still being written to (which is was by the way.) So, that's not a good way of dealing with this. I think I'm going to have to go with a time delay function here ... -- There are potential problems using timing delays, and networking compounds them. It might be more robust to use some simple method outside of php to indicate a file is busy being copied, like using a reserved extension for the copy and then renaming to the proper filename after the copy is complete, or copying to a temp directory and then moving the file to the destination directory once copied (renames and moves take milliseconds). Assuming you're able to automate the copy process. Cheers Arno